如何将 javascript 正则表达式转换为 php 正则表达式？

Question

执行此 Javascript 正则表达式以与 PHP 兼容：

^([^\x00-\x20\x22\x28\x29\x2c\x2e\x3a-\x3c\x3e\x40\x5b-\x5d\x7f-\xff]+|\x22([^\x0d\x22\x5c\x80-\xff]|\x5c[\x00-\x7f])*\x22)(\x2e([^\x00-\x20\x22\x28\x29\x2c\x2e\x3a-\x3c\x3e\x40\x5b-\x5d\x7f-\xff]+|\x22([^\x0d\x22\x5c\x80-\xff]|\x5c[\x00-\x7f])*\x22))*\x40([^\x00-\x20\x22\x28\x29\x2c\x2e\x3a-\x3c\x3e\x40\x5b-\x5d\x7f-\xff]+|\x5b([^\x0d\x5b-\x5d\x80-\xff]|\x5c[\x00-\x7f])*\x5d)(\x2e([^\x00-\x20\x22\x28\x29\x2c\x2e\x3a-\x3c\x3e\x40\x5b-\x5d\x7f-\xff]+|\x5b([^\x0d\x5b-\x5d\x80-\xff]|\x5c[\x00-\x7f])*\x5d))*$

此正则表达式非常适合验证电子邮件，并且是 javascript 中此函数的结果 (sValidEmail)：

function validateMail( sEmail )
{
    // RFC822
    var sQtext = '[^\\x0d\\x22\\x5c\\x80-\\xff]';
    var sDtext = '[^\\x0d\\x5b-\\x5d\\x80-\\xff]';
    var sAtom = '[^\\x00-\\x20\\x22\\x28\\x29\\x2c\\x2e\\x3a-\\x3c\\x3e\\x40\\x5b-\\x5d\\x7f-\\xff]+';
    var sQuotedPair = '\\x5c[\\x00-\\x7f]';
    var sDomainLiteral = '\\x5b(' + sDtext + '|' + sQuotedPair + ')*\\x5d';
    var sQuotedString = '\\x22(' + sQtext + '|' + sQuotedPair + ')*\\x22';
    var sDomain_ref = sAtom;
    var sSubDomain = '(' + sDomain_ref + '|' + sDomainLiteral + ')';
    var sWord = '(' + sAtom + '|' + sQuotedString + ')';
    var sDomain = sSubDomain + '(\\x2e' + sSubDomain + ')*';
    var sLocalPart = sWord + '(\\x2e' + sWord + ')*';
    var sAddrSpec = sLocalPart + '\\x40' + sDomain; // complete RFC822 email address spec
    var sValidEmail = '^' + sAddrSpec + '$'; // as whole string
  alert( sValidEmail );
    var reValidEmail = new RegExp(sValidEmail);

    if (reValidEmail.test(sEmail)) {
        return true;
    }

    return false;
}

谢谢！

Answer 1

为什么要使用转义序列来验证电子邮件地址？？？

您可以使用下面的一个，是的，它可以在 JavaScript 和 PHP 中使用：

[a-zA-Z0-9_\+\-]+(\.[a-zA-Z0-9_\+\-]+)*@[a-zA-Z0-9_\+\-]+(\.[a-zA-Z0-9_\+\-]+)*\.[a-zA-Z]{2,}